Area of acquired real estate property.

No definition available.

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- Definition

Completion size of acquired real estate.

+ References

No definition available.

+ Details

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- Definition

Estimated number of real estate site licenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	umh_
Data Type:	xbrli:stringItemType
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- Details

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Data Type:	xbrli:stringItemType
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- Definition

Lease agreement date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
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- Definition

Lease term.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

Lease term extended.

+ References

No definition available.

+ Details

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- Definition

Mortgage on the property transaction.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of developed homesites owned and operated.

+ References

No definition available.

+ Details

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Namespace Prefix:	umh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of manufactured home communities acquired.

+ References

No definition available.

+ Details

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Namespace Prefix:	umh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of average occupancy.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Royalty received from oil and gas.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The cash inflow associated with the collection of receivables arising from the lease of real estate, equipment or other fixed assets for a specified time in exchange for payment, usually in the form of rent; excludes proceeds from sales-type lease transactions, which are classified as operating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15, 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Investment Property and Equipment (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended			9 Months Ended						9 Months Ended
Investment Property and Equipment (Details) (USD $)	Feb. 29, 2012	Sep. 30, 2012 Homesite	Sep. 30, 2011	Sep. 30, 2012 Homesite	Sep. 30, 2011	Aug. 02, 2012 Homesite	Sep. 30, 2012 Countryside Estates [Member] acre Homesite	Sep. 30, 2012 Meadowood Estates manufactured home community [Member] acre Homesite	Sep. 30, 2012 Pennsylvania and New York [Member] acre Homesite	Aug. 02, 2012 Pennsylvania and New York [Member] Homesite	Aug. 02, 2012 New York [Member] Homesite	Aug. 02, 2012 Pennsylvania [Member] Homesite	Sep. 30, 2012 Other manufactured home community [Member] acre Homesite	Sep. 12, 2012 Other manufactured home community [Member] Homesite
Investment Property And Equipment (Textual)
Area of acquired real estate property (in acres)							64	20	200				62
Number of developed homesites owned and operated		10,400		10,400		968	90	123	968				280
Purchase price of acquired entity							$ 2,100,000	$ 3,400,000	$ 28,250,000				$ 5,900,000
Estimated number of real estate site licenses							Over 200 sites
Completion size of acquired real estate							Approximately 200-210 sites
Number of manufactured home communities acquired						11				11	1	10		2
Percentage of average occupancy									92.00%				89.00%
Mortgage from Sun National Bank on the property transaction									13,980,000
Variable rate on mortgage	LIBOR plus 3.25								(LIBOR plus 3.00%)
Maturity date of mortgage	Feb. 01, 2017								Aug. 01, 2017
Basis point on mortgage									3.00%
Professional fees and other acquisition costs		483,119	25,813	753,060	161,439
Lease agreement with Oil and Gas communities, date				May 23, 2012
Lease term				5 years
Option to extend lease term				5 years
Proceeds from lease signing with Oil and Gas community				$ 499,471
Royalty received from oil and gas, percentage				20.00%